DeFelsko PosiTest AT-M Manual De Instrucciones página 4

3.
Gently push down on the dolly to squeeze out excess adhesive. Do not twist
or slide the dolly back and forth on the coating as air bubbles may be gener-
ated.
4.
Carefully remove excess adhesive from around the edges of the dolly with
included cotton swabs.
5.
Allow to cure per the adhesive manufacturer's instructions
NOTE:
Many adhesives cure faster and provide a stronger bond when cured
with heat. Similarly, cold environments may cause a longer cure time and weak-
er bond strength.
Step 3: Test Area Separation
Step 3: Test Area Separation
The decision of when to cut around a dolly is dependent on the standard,
specification or contractual agreement to which the test is to comply. The primary
purpose for cutting through the coating is to isolate a specific diameter test area.
When the decision to cut into the coating has been made, it is recommended to
cut all the way through to the substrate. As a minimum, it is suggested to carefully
cut away excess adhesive from the dolly application process. This typically
prevents a larger area of coating from being pulled away from the substrate,
resulting in a higher pull-off pressure.
Cutting Instructions
1.
Cut through the coating around the edges of the dolly with the included cut-
ting tool, removing any excess adhesive.
2.
Clear away any debris from the cutting process.
-
Cutting may induce coating surface flaws such as microcracking that
NOTE:
may alter test results.
-
For coatings with strong lateral bonding it is recommended to cut
completely through the coating down to the substrate.
Drilling Template
When testing very thick coatings, an optional drilling template may be preferred.
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